Software Engineer; MCU

About the role

Ensera Design is a world‑class user‑centred innovation and product development consultancy, specialising in the medical and consumer health sectors with offices in Bristol, Colorado and New Jersey. As part of Ensera, we collaborate globally with contract manufacturing facilities in Europe, the USA, and Asia.

We are currently seeking an embedded Software Engineer to join our talented team and contribute to delivering exceptional solutions for our clients.

You’ll join a multidisciplinary team developing a greenfield medical device from the ground up.

Day to day, your focus will be designing and implementing microcontroller‑based systems in embedded C/C++. You’ll sit alongside hardware, Linux, UI and test engineers and have the opportunity to make a genuine contribution to a medical device project.

You’ll have a team of Senior Software Engineers around you who’ll mentor you throughout. Due to the nature of Ensera Design’s work, you’ll have the opportunity to either branch out into other specialisms or go deeper into the one you’re already in.

You’re an engineer who has worked across safety‑critical systems and/or medical devices in the past with a desire to develop using embedded C/C++ targeting STM
32 ARM microcontrollers or similar platforms. You’ll be a strong communicator with a desire to share knowledge and mentor junior members of the team - you’ll also be mentored by experienced engineers who have grown with the business.

You’ll be interested in working on safety‑critical applications across the full development lifecycle and in accordance with safety and reliability standards such as IEC 62304.

• Design and implement MCU firmware in line with agreed system and security architecture
• Support MCU subsystems and components
• Develop embedded C/C++ code for real‑time systems
• Collaborate with hardware, Linux, UI, connectivity, and test teams on integration topics
• Define and maintain coding standards and design patterns for MCU software
• Support fault investigation, root‑cause analysis, and corrective actions
• Share knowledge and mentor more junior members of the team

You don’t need to tick every box but if you hit most of the essentials, we’d love to hear from you.

• About 3‑5 years’ experience developing embedded firmware on MCUs (ARM Cortex‑M or equivalent)
• Solid C and/or C++ skills
• Experience with RTOS‑based systems
• Understanding of hardware‑software interfaces and peripheral drivers
• Experience working in quality‑controlled or safety‑critical development environments

• Experience with STM
  32 or similar MCU families
• Boot loader, firmware update, or secure startup experience
• Familiarity with MISRA or similar embedded coding standards
• Experience with communication protocols (UART, SPI, I²C, CAN)
• Exposure to cybersecurity considerations at MCU level

The salary for this role is up to £53,000, in line with our Consultant band (£40,800 to £53,000). We ask you to provide your expected salary within the band as part of your application.

Ensera Design offers interesting and varied work combined with a supportive team culture to provide a stimulating environment where you will have the opportunity to develop and learn from others. We offer flexible working policies where working patterns are agreed with our line managers, taking into account the role, needs of the individual, and the team.

We recognise that we are only as good as our people and we know how important it is to support our team.

• Performance‑related company‑wide bonus
• Flexible hybrid working in line with our core hours (Mon‑Thu, 9:30 am–12:00 pm & 2:00 pm–4:00 pm; Fri, 9:30 am–12:00 pm)
• Private healthcare for you and your family
• Enhanced maternity and paternity leave
• Salary exchange pension scheme
• 25 days of annual leave, plus the option to purchase up to one working week and additional days for length of service
• Access to our Employee Assistance Programme and digital wellbeing platform
• Cycle to Work & Electric Vehicle Lease schemes
• Death in service (x4 gross salary)
• Training and development opportunities, including dedicated learning days and regular knowledge‑sharing sessions
• A…